Every number on Body Visualizer 3D is meant to be traceable to a named source or to the tool's own arithmetic. This page says how that is done.
How pages are prepared
Pages are prepared with AI assistance from the sources listed at the end of each page. For each fact, the source document is read and the number on the page is compared with the number in the document.
No page says a person has read it until one has. When a person on the team has read a page, the page says so with the date. Until then a page shows only its dates of publication and last update.
No page claims that anyone tested a product, examined a patient or measured a body. The site does none of those things.
Sources we accept
For health figures: public health agencies and guideline bodies such as the CDC, the National Institutes of Health, the World Health Organization and NICE, and the published papers a formula comes from. For anatomy: training material from recognized institutions and standard reference texts, such as the US National Cancer Institute's SEER program, pages of the National Institutes of Health and the 1918 edition of Gray's Anatomy, which is in the public domain. For body measurements: national survey reports and the clothing research the shape rules come from.
Where two good sources disagree, the page gives both figures and says which body states which. Every one of the guides lists the documents it drew on. Retailers, forums and other calculators are not used as sources.
How the tools are checked
Each formula in a tool has automated tests that compare its answers with worked values from the source. A failing test stops the site from being published. Worked examples on tool pages are produced by the tool itself.
The body figure is a general model. It has not been validated against measured people, and no page says it has.
Pictures
Pictures of figures are drawn by the site's own body model from the numbers shown beside them. They are never photos of people and are labeled as model drawings. Anatomy pictures come from the BodyParts3D model credited on the about page.
Health content
The site explains what a measure is and what the source says it means. It does not diagnose, recommend treatment or judge bodies. Screening figures such as BMI are described as what they are. The disclaimer says more.
Corrections
If something is wrong, email hello@bodyvisualizer3d.com with the page and, if you have it, the source. A confirmed mistake is corrected on the page and its "Last updated" date changes.
Advertising
The site shows no advertising today. It plans to carry advertising from Google later. Ads will sit apart from the tools and will not decide what a page says or which sources it uses.